Description
Series 40 Ball Bearing Block – Single – Universal Head
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required.
Features:
- Low friction Acetal or Torlon® bearing system
- Lightweight
- Cheek cut-outs for easy bearing maintenance
- Captive Lock universal head
- Slotted pin shackle eliminates fouled lines
Applications:
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26′)
Materials:
- U.V. Stabilized Acetal sheaves
- Acetal ball bearings
- Impact and U.V. resistant, fiber reinforced Nylon cheeks
- Grade 316 stainless steel load strap and head fitting
Specifications:
Sheave Ø: 40mm(1-9/16″)
Max. Rope Ø: 10mm(7/16″)
Pin Ø: 5mm(3/16″)
M.W.L.: 350kg(770lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 70g(2.5oz)
Explore more from our collection.
![Ronstan Series 40 Ball Bearing Block - Single - Universal Head [Rf40100] 1](https://autopartsflow.shop/wp-content/uploads/2026/06/55210XL-1Uw1rM.tmp_.webp)
![Ronstan Series 20 Ball Bearing Block - Double - 2-Axis Shackle Head [Rf20202] 1](https://autopartsflow.shop/wp-content/uploads/2026/06/55139XL-StfaRV.tmp_.webp)
![Ronstan Nylatron Sheave Box - Single Upright Lead Block [Rf453] 1](https://autopartsflow.shop/wp-content/uploads/2026/06/55219XL-GuQa8B.tmp_.webp)
![Ronstan Series 20 Ball Bearing Orbit Block - Single - Dyneema Lashing - Becket Option [Rf25109] 1](https://autopartsflow.shop/wp-content/uploads/2026/06/55155XL-fQMufI.tmp_.webp)
Reviews
There are no reviews yet.